Maueice mijib



1 To all whom it muy concern:

` share. Fg. 3`isa bottom view.

` or vAcAviLLE, l ALIFORNIA; y' i Specification forming part of Letters Patent No. 89,788., dated May 4, 1869.

i Be it known that, I,\MAURIGE MURPHY, of Vacaville, county of Solano, State ofCalifornia, have invented lan Improved Gang-Plow; and I do hereby declarethe following description` and accompanying drawings are sufli- `cient to enable any person skilled in the art i or science to'iwhich` it most-nearly appertains to make and use `my said invention or improvement withontfurt-her invention orexperiment. n Y

j My invention relates to certainj improvements in gang-plows; and consists, iirst, in so attaching the' supporting-frame of the plowsl to a bent or crank axle that the depth to which l `it is 4decided to cut` on any piece of land is 4easilyregulated and varied from two to ten inches.

1t also consists in a novel` construction of y the share and 'mold-board, by which much greaterefticiency and; ease in cuttin and laying the furrows are obtained.

` The first part of my lnvention made by supporting the frame of the plows upon a crank-axle,1`a suitable lever being attached, by

which to raise andlower it, this device being common, y l l 1 The land-wheel turns upon an` axle which basa half-crank," and this crank has its eye made polygonalpand fitting on a similarlyformed pin,the number of sides being determined, 'so that the plows shall have three or more different levels on which to work; y The share isvconstructed long and low, but

"convexed slightly above. The mold-board commences `atthebase of the share, being made considerablynarrower, and its lower edge is convexor curved under, the curve gradually changing, so as to be concavenear the top. 'llhe standards are cast in such a man'- ner as `to be easily renewed 1n case of wear.

" "lo more fully describe my invention, reference is made to thejaccompanying drawings and letters of reference.

\ Figure l is a. side view, showing the plows. Fig; 2 is a plan viewof the mold-board and Fig. 4L is a viewof the crank-eye.

. Similar letters of reference in each of the figures indicate like parts. 3

A is the frame of a gang-plow, and is mounted on wheels B by means of a bent or crank axle. 4rlhe crank on the side of the furrow-wheel is loose, and turns on the axle, the whole frame being raised and lowered by,

a l,ever,vC, and held at any desired height by a rack, D.

In order to regulate the level at which the furrow-wheel is to travel, and thereby the y depth of the furrow, the land-wheel is mounted by means of an adjustable crank, E. The eye of this crank is made polygonal, and the end a of the axle on which it ts is similarly shaped.' With this device the crank may be removed by taking off a nut, and replaced at y an angle to its former position, which will cause the plows to run level when raised or lowered, as desired,'and the depth may be varied om two to ten inches.

The plows are of peculiar construction, the f share F being long and low, and attached -to the land-side G by bolts at one side. The furrow' side is bent around, so as to form a sort of socket, H, into which the `point I ofthe vland-side enters, holding it fast. The share is slightly convexed on its upper surface, and is widened from the point b back to c, so that it passes under the soil with comparatively little resistance. Behind the point c the share is suddenly contracted in width, and is turned under to form the socket H,before mentioned. The mold-board J commences at the rear end ofthe share, and the outside bottom edge d 1s made convex instead of concave, and turns under very slightly at the front end, but more toward the rear.

This manner of forming the plow gives it a surface which is concave from the point b of the share in a line to the top e of the moldboard, but convex in any line transverse to this, which, with the manner 'of curving the rear of the mold-board, graduallyv raises the soil presenting the least possibleresistance, and lays the furrow smoothly, and is especially useful in wet or heavy ground or adobe soil, such as is frequently found in California, as the form of the mold-board prevents clogging, and always keeps the plow free from the adhesive soil. Y

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In combination with the arm or lever 0,: .3. The incid-boards J, when constructed rigidly xed upon the crank for` raising the with the surface curved, as described, and plow-frame, the adjustable connection of the having the convexed edge d, substantially as crank E to the aXle by a polygonal pin and herein described.

corresponding eye, substantially ,as and vfor In witness whereof I have hereunto set my the purpose set forth. A hand and seal.

2. The 10W convexed shareF, having the MAURICE MURPHY. [L. s] extended point c and the'eye or socket H, .Witnessesz constructed substantially as and for the pur- JOHN L. BOONE, pose described. A. T. DEWEY. 

